The skyline32 runs the open-source Cleanflight flight control (FC) software which has an ever-growing community of friendly developers and users. Being open-source means that you too can contribute to the system.

Specification

Note: SKYLINE32 hardware is compatible with NAZE32 firmware, including cleanflight, baseflight. Below are the links to the source codes:
https://github.com/cleanflight/cleanflight
https://github.com/multiwii/baseflight

SKYLINE32 is loaded with baseflight and Baseflight-Configurator GUI. This manual is a baseflight Setup Tuning Guide for SKYLINE32.
If you are using cleanflight firmware, please refer to the below link to download and install cleanflight Configurator:
https://chrome.google.com/webstore/search/cleanflight?utm_source=chrome-ntp-icon

Note: with firmware and configuration based on “MultiWii” software, the processor used is not Atmel AVR, and can not be compiled via Arduino or other AVR tools.
Below is some information about STM32 development: 
//code.google.com/p/afrodevices/wiki/STM32Development